HTTP Header Checker
Free HTTP header checker. Inspect the response status and headers of any URL, including security headers, caching and X-Robots-Tag.
About the HTTP Header Checker
Headers decide whether a page is cached, indexable (X-Robots-Tag) and protected (HSTS, CSP, X-Content-Type-Options). The checker grades the important security headers so you can spot gaps quickly.
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robots.txt Tester
Fetch live robots.txt rules, list sitemaps and test whether a path is allowed.
DNS Lookup
A, AAAA, CNAME, MX, NS, TXT, CAA and SOA records for any domain.
FAQ
Is the HTTP Header Checker free?
Yes. The HTTP Header Checker is completely free, with no account, trial or credit card. To keep it fast for everyone, each visitor gets a fair-use rate limit.
Do you store what I check?
No. Our server fetches the URL or domain you enter, sends the result back to your browser and doesn't keep it. We only fetch public addresses.
What should I do after using it?
Fix what it found, then launch your product on ShipX: a free launch gives you a permanent product page with a dofollow link back to your site. Launch on ShipX
Ready to launch?
Launch free on ShipX and get a permanent product page with a dofollow link to your site. No audience required.